Copy Paste uv from one object to a different object
You could just unwrap your mesh from top view(Numpad 7) and move and resize your image in UV editor by pressing S for scale and G to grab.  Your mesh might give you some trouble when you unwrap it depending on your mesh. You might have to manually create islands using smart uv project and move them into place for each province after unwrapping.  Hope this helps.

The fundamentals of unwrapping can be found in this video https://www.youtube.com/watch?v=scPSP_U858k&amp;t=763s